/*
 * Copyright (c) 2008-20018 Saša Stamenković <umpirsky@gmail.com>
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without modification,
 * are permitted provided that the following conditions are met:
 *
 *    * Redistributions of source code must retain the above copyright notice,
 *      this list of conditions and the following disclaimer.
 *    * Redistributions in binary form must reproduce the above copyright notice,
 *    	this list of conditions and the following disclaimer in the documentation
 *    	and/or other materials provided with the distribution.
 *    * Neither the name of the <ORGANIZATION> nor the names of its contributors
 *    	may be used to endorse or promote products derived from this software without
 *    	specific prior written permission.
 *
 *    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 *    AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 *    WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 *    IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
 *    INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 *    NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
 *    OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
 *    WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 *    ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

package umpirsky;

import java.io.FilterOutputStream;
import java.io.IOException;
import java.io.OutputStream;

import org.apache.commons.httpclient.methods.RequestEntity;

/**
 * @author Saša Stamenković <umpirsky@gmail.com>
 *
 */
public class UmpirskyRequestEntity implements RequestEntity {
	/**
	 * RequestEntity
	 */
	private final RequestEntity entity;

	/**
	 * ProgressListener
	 */
	private final ProgressListener listener;

	/**
	 * @param entity
	 * @param listener
	 */
	public UmpirskyRequestEntity(final RequestEntity entity, final ProgressListener listener) {
		super();
		this.entity = entity;
		this.listener = listener;
	}

	/** (non-Javadoc)
	 * @see org.apache.commons.httpclient.methods.RequestEntity#getContentLength()
	 */
	public long getContentLength() {
		return this.entity.getContentLength();
	}

	/** (non-Javadoc)
	 * @see org.apache.commons.httpclient.methods.RequestEntity#getContentType()
	 */
	public String getContentType() {
		return this.entity.getContentType();
	}

	/** (non-Javadoc)
	 * @see org.apache.commons.httpclient.methods.RequestEntity#isRepeatable()
	 */
	public boolean isRepeatable() {
		return this.entity.isRepeatable();
	}

	/** (non-Javadoc)
	 * @see org.apache.commons.httpclient.methods.RequestEntity#writeRequest(java.io.OutputStream)
	 */
	public void writeRequest(final OutputStream out) throws IOException {
		this.entity.writeRequest(new CountingOutputStream(out, this.listener));
	}

	/**
	 * @author Saša Stamenković <umpirsky@gmail.com>
	 *
	 */
	public static interface ProgressListener {
		/**
		 * @param bytes
		 */
		void transferred(long bytes);
	}

	/**
	 * @author Saša Stamenković <umpirsky@gmail.com>
	 *
	 */
	public static class CountingOutputStream extends FilterOutputStream {
		/**
		 * ProgressListener
		 */
		private final ProgressListener listener;
		/**
		 * Bytes transfered
		 */
		private long transferred;

		/**
		 * @param out
		 * @param listener
		 */
		public CountingOutputStream(final OutputStream out, final ProgressListener listener) {
			super(out);
			this.listener = listener;
			this.transferred = 0;
		}

		/** (non-Javadoc)
		 * @see java.io.FilterOutputStream#write(byte[], int, int)
		 */
		@Override
		public void write(byte[] b, int off, int len) throws IOException {
			super.write(b, off, len);
			this.transferred += len;
			this.listener.transferred(this.transferred);
		}

		/** (non-Javadoc)
		 * @see java.io.FilterOutputStream#write(int)
		 */
		@Override
		public void write(int b) throws IOException {
			super.write(b);
			this.transferred++;
		}

	}
}